Hello everyone, I am doing an online survey through online panel of Amazon Mechanical Turk. how I can find a sample size formula not to be old?

I used Cochran (1963) sample size formula, but as it shows it so old and my advisor asks for some new references for finding an appropriate sample size.

01 February 2021 8,275 4 View

Does anyone know any article on free convection heat transfer from an oblate with uniform heat flux?

Does anyone know any article on free convection heat transfer from an oblate spheroid with uniform heat flux? All articles I've found are about isothermal oblates.

14 December 2020 1,163 4 View

How can I simulate electroporation for a bilayer?

hi I am trying to simulate electroporation for a bilayer containing 10% cholesterol on GROMACS. I have read lots of articles but the only parameter that they have talked about was the electric...

15 November 2020 7,602 2 View

How can I correct my electrostatic potential figure to be symmetric?

hi. I have done electrostatic potential analysis on a symmetric bilayer contains 10% Cholesterol but I've got this figure and I thought there is a problem with that as the potential is not...

09 November 2020 7,137 1 View

How should I make an index for gangle in GROMACS?

Hi. I'm analyzing a bilayer and I want to make an index for calculating tilt angle. my problem is I have no idea about how to create such an index which contains vectors in it. I would be...

01 October 2020 9,021 1 View

How can I build a DMPC bilayer contains certain numbers of Cholesterol molecules on GROMACS?

Hi. I'm new to GROMACS and I want to simulate a DMPC bilayer contains 8 Cholesterol molecules. But I have no idea about how to add Cholesterol molecules to my simulation box.

07 July 2020 5,699 1 View

How can i resolve the size of nested-multiplex pcr?

Hi there, I have a problem to get a conclusion in my PCR results. I have nested-PCR product in which the first run size is what i expected to be. However, the second run is ~100nt larger than...

21 September 2018 3,901 5 View

How to optimize periplasmic protein expression in E.coli (BL21)?

I want to optimize protein purification. My protein is expressed in periplasmic space of E.coli. I particularly want to know what is the routine protocol for these kind of proteins. Is it 1mM...

16 July 2017 5,042 7 View

Whats are the usage of isochornal annealing of metalic glass?

13 May 2017 1,335 2 View

High power density for the Pt/C cathode?

09 September 2016 2,316 1 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

How can I integrate a routing protocol in a tiny device (e.g. Raspberry Pi)?

Hi Community, I'm facing the issue of integration/compiling a new routing protocol in a WSN simulator. The final goal is to successfully add, configure this routing protocol in hardware devices...

01 March 2021 9,332 6 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

How to make fractions of chloroform extract of plant, using seperating funnel?

28 February 2021 8,466 2 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

How to improve and implement WBAN MAC and Radio modules under Castalia 3.2 ?

Hello researchers, Hello Castalia3.2 researchers I am a beginner with Castalia, I work on optimization of RFID systems used in wireless body networks. I simulated a WBAN with 10 nodes and one...

28 February 2021 400 1 View